[Gonzih]

So does that mean that software will always have mic on?

[gcr]

The presentation implies that you have to click the "share screen" button before your computer will try to detect the ultrasound signal.

[carlosdp]

Maybe, but there's no reason for it to send any audio anywhere while it's parsing ultrasound, so not a privacy problem.

[Gonzih]

Until software is compromised or simply has a bug that stream audio somewhere.

[tinus_hn]

If software that continuously listens to the microphone is normal this makes it harder to keep track of apps that should not do that.